136866241 has 4 divisors (see below), whose sum is σ = 140204484. Its totient is φ = 133528000.

The previous prime is 136866239. The next prime is 136866251. The reversal of 136866241 is 142668631.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38440000 + 98426241 = 6200^2 + 9921^2 .

It is a cyclic number.

It is not a de Polignac number, because 136866241 - 2¹ = 136866239 is a prime.

It is a super-3 number, since 3×136866241³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 136866241.

It is not an unprimeable number, because it can be changed into a prime (136866251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1669060 + ... + 1669141.

It is an arithmetic number, because the mean of its divisors is an integer number (35051121).

Almost surely, 2^136866241 is an apocalyptic number.

It is an amenable number.

136866241 is a deficient number, since it is larger than the sum of its proper divisors (3338243).

136866241 is an equidigital number, since it uses as much as digits as its factorization.

136866241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3338242.

The product of its digits is 41472, while the sum is 37.

The square root of 136866241 is about 11698.9846140595. The cubic root of 136866241 is about 515.3458461832.

The spelling of 136866241 in words is "one hundred thirty-six million, eight hundred sixty-six thousand, two hundred forty-one".